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I have been registered under GST and filed all return up to October 2017, now that is from 22.11.2017 I opted to Composite scheme, shall I bill my invoice in the composite scheme from nov.22.112017 and what returns are to be filed for the month of November 2017, Please suggest?

I have been registered under GST and filed all return up to October 2017, now that is from 22.11.2017 I opted to Composite scheme, shall I bill my invoice in the composite scheme from nov.22.112017 and what returns are to be filed for the month of November 2017, Please suggest?

You can opt for composition up to 31.03.2018. It will be operational from the first day of the succeeding month from the end of the month of exercising of the option. GSTR 4 will be filed only for that portion of that quarter and returns will be filed as a normal taxpayer for the remaining period.